London dispersion forces are formed due to instantaneous ______________ formation.

dipole

From these three choices, CH₄ , NH₃ and H₂O , which one does NOT have the capacity for hydrogen bonding?

CH₄ does not use hydrogen bonding because the difference in electronegativity between C and H is too small.

Which statement explains the attraction between the water molecules?

Water is a polar molecule. The slightly negative end of the molecule attracts to the slightly positive end of other molecules. This forms a weak connection between the molecules.

Which of the following compounds are most likely to form hydrogen bonds?

H₂O

Which of the following statements best explains why ice floats on water?

Hydrogen bonding causes water to be less dense in the solid state than in the liquid state .

Substances that exhibit hydrogen bonding or dipole-dipole forces are generally soluble in ______________.

water

Are melting points of molecular compounds generally higher than, lower than, or the same as those of ionic compounds?

lower than

Which statement best explains these properties?

Ammonia is polar and experiences hydrogen bonding attractions between neighboring molecules and makes it harder to overcome the intermolecular forces needed for the phase change from liquid to gas.

Intermolecular forces include all of the following EXCEPT:

covalent bonding

The most important intermolecular force in CCl₄ is:

london dispersion forces

The ________ shape of water allows several water molecules to bond together, which influences its physical properties.

bent

Select the substance with the lowest boiling point and identify the most important intermolecular force responsible for the difference in boiling point.

CH₄ has the lowest boiling point because it uses London dispersion forces.

London dispersion forces are formed due to instantaneous _____ formation.

dipole

What is a term for attractive forces that occur between polar molecules?

dipole-dipole forces

Generally, are London dispersion forces stronger or weaker than dipole-dipole forces?

weaker

Movement of the ____________ creates the London dispersion forces.

electrons

When you put sodium metal in liquid ammonia, what is the intermolecular attraction between Na⁺ ions and NH₃ molecules?

Ion-dipole

When KOH dissolved in ethanol, what is the intermolecular attraction between OH^- ions and C₂H₅OH molecules?

Ion-dipole`

Which statement about London dispersion forces is TRUE?

London Dispersion forces are temporary in nature.

When KCl dissolved in ethanol, what is the intermolecular attraction between K⁺ ions and ethanol molecules?

Ion-dipole

What are dipole-dipole forces?

intermolecular force between polar molecules

Which noble gas below has the lowest boiling point?

Ne

Which of the following is the weakest intermolecular force?

London dispersion force

When KNO₃ dissolved in water, what is the intermolecular attraction between NO₃ ^- ions and H₂O molecules?

Ion-dipole

Which of the following statements best explains why ice floats on water?

Hydrogen bonding causes water to be less dense in the solid state than in the liquid state.

Which of the following compounds is most likely to form hydrogen bonds?

H₂O

The _________ shape allows several water molecules to bond together, which influences its physical properties.

bent

Which of the following compounds is/are most likely to form hydrogen bonds?

HF

Complete the sentence using one of the following terms: proton, neutron or electron.

When H is covalently bonded to N, O or F, the strongly electronegative atoms pull the electrons in the covalent bond close to themselves, leaving H as almost a bare ___________.

proton

Which of the following does not have hydrogen bonds?

Hydrogen chloride

The O-H covalent bond in a water molecule is best described as being _____.

very polar

In addition to hydrogen bonding, what also contributes to the fact that ice is less dense than liquid water?

its bent shape

In the case of hydrogen bonds, the hydrogen donor is strongly:

Electronegative

True or False:

Because the molecular weight of hydrogen chloride is heavier than that of water, the boiling point of hydrogen chloride is higher than that of water

False

Properties of solids depend on:

All of the above

Complete the sentence using one of the following terms: water, hexane or oil.

Substances that exhibit hydrogen bonding or dipole-dipole forces are generally soluble in __________.

water

Are melting points of molecular compounds generally higher or lower than those of ionic compounds?

lower

Intermolecular forces are _____ as compared to intra-molecular forces.

Much weaker

What type of solid is diamond?

covalent network

Why do covalent crystals have high melting and boiling points?

The network covalent bond is very strong.

Which of the following statements is wrong?

Covalent compounds are generally soluble in polar solvents

Diamond is composed entirely of _____ atoms that are connected by _____ bonds.

carbon; covalent

Intermolecular forces include all of the following EXCEPT _____

covalent bonding

Nonpolar solvents will most easily dissolve solids that are

nonpolar.

This is the structure picture of fullerene (C₆₀).

The type of chemical bond that holds fullerene (C₆₀) together is

covalent